St. Marys and Calvert County Maryland HVAC Services   ♦   We Make Your Air Flow!

Leonardtown Hollywood St Marys County MD HVAC Heating & Air Contractor

Carrier heat pump infinity

Great Mills Heating and Air Conditioning, Inc. is a Southern MD, locally owned, HVAC contractor located in St. Mary’s County and specializing in the repair, installation and servicing of Carrier home, residential, commercial, heat pumps, gas furnaces, propane furnaces, oil furnaces, water heaters, humidifiers and radiant heating. We also repair any make or model of heating and cooling comfort control system, heat pump or furnace.

Great Mills is your St. Marys County heat pump repair, heat pump maintenance and heat pump replacement contractor in existing homes and commercial comfort control systems in the following areas: Mechanicsville, Charlotte Hall, Leonardtown, Lexington Park, California, Callaway, Wildwood, Great Mills, Hollywood, Dameron, Drayden, St. Indigoes, Ridge, Scotland, Tall Timbers, Valley Lee, St Marys City and all of St. Mary's County, Maryland.

Ask us about Geothermal Heating and Cooling Systems

Great Mills Heating and Air also installs WaterFurnace geothermal systems for homes who manufactures and sells more than anyone else in the business.

St Marys County MD Heat Pumps, Heating & Cooling System Installation Services & System Types

  • Dameron Heating & Cooling Zoning
  • Drayden Heating & Cooling System Service Agreements
  • St Indigoes Heating & Cooling System Service & Repair
  • Ridge Heating & Cooling Air Duct Cleaning
  • Scotland Direct Heating & Cooling System Replacement
  • Tall Timbers Heating & Cooling System Service & Repair
  • Leonardtown Oil Tank Installations
  • Hollywood Oil Tank Service & Repair
  • Lexington Park Oil Furnaces Installations
  • California Oil Furnace Service & Repair
  • Mechanicsville Gas Furnaces Installations
  • Charlotte Hall Gas Furnace Service & Repair
  • Mechanicsville Propane Furnace Installations
  • Charlotte Hall Propane Furnace Service & Repair
  • Lexington Park Radiant Heating Installations
  • Hollywood Radiant Heating Service & Repair
  • Leonardtown Geothermal Heating and Cooling Systems
  • California Heat Pumps Installations
  • Wildwood Heat Pump Service & Repair                            
  • Callaway Air Conditioning Installations
  • St Marys City Air Conditioning System Service & Repair

heat pumps so MD

For a FREE estimate or service appointment click here

Phone: 301-994-0522 Emergency Service after 5pm: 240-925-2230